Write down 1.3 as a fraction with 1 as the whole number and 0.3 as the decimal part:
1.3 = 1 + 0.3
Recognize that the decimal 0.3 is equivalent to 3/10:
1.3 = 1 + 3/10
Combine the whole number and the fraction:
1.3 = 1 + 3/10
To write the combined fraction in terms of a common denominator, multiply 1 by 10/10 to get:
1 = 10/10
Add the fractions together:
1 + 3/10 = 10/10 + 3/10 = 13/10
So, 1.3 is equivalent to the fraction 13/10.